Emerson 400V, 50 and 60 Hz Battery Circuit Breaker Box, UPS-circuit breaker configurations

Battery Installation

2.6Battery Circuit Breaker Box

The box contains a battery isolating circuit breaker and the circuit breaker controller board as also mounted in the battery cabinet.

A range of battery circuit breaker boxes is available for use in installations where the battery is not installed in the battery cabinet, in which case the appropriate battery box is fitted as close as possible to the battery and connected to the UPS equipment as illustrated in Figure 25.

The battery circuit breaker box, used with the circuit breaker controller board, is required to protect the battery from deep discharging and overcurrents. It also provides electrical isolation between the UPS and the battery, permitting technical service personnel to reduce the risks involved in mainte- nance work to a minimum. Inside the box are connection bars for power cables arriving from the UPS and from the battery.

NOTE

The control cables from the UPS unit to the controller board must be made using a 5-core shielded cable located in a separate conduit to that containing the battery power cables.

The control signal cable is connected to the circuit breaker controller board through the terminal board.

The cable shield must be earthed to prevent induced noise affecting the control operation, and a sepa- rate safety earth must be connected between the UPS unit and circuit breaker box.

The configurations in Table 9 are available, depending on the UPS power rating.

Table 9	UPS-circuit breaker configurations
		Dimensions	Weight
UPS		HxWxD, mm (in)	kg (lb)		Circuit Breaker
30 to 40 kVA		558x378x180	21.5	(47.4)	125A 4p
60 to 80 kVA					200A 4p
		(22x14.9x7)
100 to 120 kVA			25	(55)	400A 4p
140 to 160kVA		825x530x195	30	(66)	400A 4p
		(32.4x21x7.7)
200kVA			32	(71)	500A 4p

Listed weights do not include packaging.

The BCB box contains a battery isolating circuit breaker and a circuit breaker controller board and offers the following features:

•Short-circuit and End Of Discharge protection—The circuit-breaker (or internal UPS battery con- tactor when fitted) automatically opens when the EOD voltage is reached

•UPS Emergency Stop compatibility—The circuit-breaker (or internal UPS battery contactor when fitted) opens when the emergency stop button is pressed on the UPS front panel.

NOTE

30 to 40kVA UPS models fitted with internal battery and any UPS models fitted with a Battery Start kit contain an internal UPS battery contactor for automatic connection and disconnection of the batteries and the battery circuit breaker undervoltage coil is not used. Refer to 2.5 - Battery Control for details

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